Netflix not working on my 360 box
Hi I have the same issue and 360 box, we had a power cut and when the box restarted everything seemed ok but net flix does not start correctly netflix appears on screen and a red circle rotates below it.
Just setting match frame rate to off has fixed this problem for some people.
If that doesn't work I would try a factory reset.
It's only a partial system reset and not a complete factory reset. You are given 2 options,
Keep Recordings
Format DiskChoosing Keep Recordings, means you won't lose your recordings and any planned recordings or series links you've set up, but you will have to sign into your apps such as iPlayer, Prime, Netflix and ITVX again, also Match frame rate and Standby power consumption will go back to their default settings if you have changed them.